java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-9.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:27:42,609 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:27:42,612 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:27:42,624 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:27:42,625 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:27:42,625 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:27:42,627 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:27:42,630 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:27:42,632 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:27:42,633 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:27:42,634 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:27:42,635 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:27:42,636 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:27:42,639 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:27:42,640 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:27:42,641 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:27:42,642 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:27:42,651 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:27:42,652 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:27:42,653 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:27:42,657 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:27:42,659 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:27:42,659 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:27:42,659 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:27:42,662 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:27:42,663 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:27:42,663 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:27:42,664 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:27:42,668 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:27:42,668 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:27:42,669 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:27:42,670 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:27:42,670 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:27:42,671 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:27:42,671 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:27:42,671 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:27:42,692 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:27:42,692 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:27:42,692 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:27:42,692 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:27:42,694 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:27:42,694 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:27:42,694 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:27:42,695 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:27:42,695 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:27:42,695 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:27:42,695 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:27:42,695 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:27:42,696 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:27:42,696 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:27:42,696 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:27:42,696 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:27:42,696 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:27:42,696 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:27:42,697 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:27:42,699 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:27:42,699 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:27:42,746 INFO ]: Repository-Root is: /tmp [2018-06-22 14:27:42,761 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:27:42,766 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:27:42,768 INFO ]: Initializing SmtParser... [2018-06-22 14:27:42,768 INFO ]: SmtParser initialized [2018-06-22 14:27:42,769 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-9.smt2 [2018-06-22 14:27:42,770 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 14:27:42,851 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-9.smt2 unknown [2018-06-22 14:27:43,910 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-9.smt2 [2018-06-22 14:27:43,915 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:27:43,921 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:27:43,922 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:27:43,922 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:27:43,922 INFO ]: ChcToBoogie initialized [2018-06-22 14:27:43,925 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:27:43" (1/1) ... [2018-06-22 14:27:43,996 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:43 Unit [2018-06-22 14:27:43,997 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:27:43,997 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:27:43,997 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:27:43,997 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:27:44,035 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:43" (1/1) ... [2018-06-22 14:27:44,035 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:43" (1/1) ... [2018-06-22 14:27:44,065 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:43" (1/1) ... [2018-06-22 14:27:44,067 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:43" (1/1) ... [2018-06-22 14:27:44,103 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:43" (1/1) ... [2018-06-22 14:27:44,105 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:43" (1/1) ... [2018-06-22 14:27:44,116 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:43" (1/1) ... [2018-06-22 14:27:44,127 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:27:44,128 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:27:44,128 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:27:44,128 INFO ]: RCFGBuilder initialized [2018-06-22 14:27:44,128 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:43" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 14:27:44,140 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:27:44,140 INFO ]: Found specification of procedure False [2018-06-22 14:27:44,141 INFO ]: Found implementation of procedure False [2018-06-22 14:27:44,141 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:27:44,141 INFO ]: Found specification of procedure state [2018-06-22 14:27:44,141 INFO ]: Found implementation of procedure state [2018-06-22 14:27:44,141 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:27:44,141 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:27:44,141 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:27:45,296 INFO ]: Using library mode [2018-06-22 14:27:45,296 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:27:45 BoogieIcfgContainer [2018-06-22 14:27:45,296 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:27:45,297 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:27:45,297 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:27:45,301 INFO ]: TraceAbstraction initialized [2018-06-22 14:27:45,301 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:27:43" (1/3) ... [2018-06-22 14:27:45,302 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11733624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:27:45, skipping insertion in model container [2018-06-22 14:27:45,302 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:43" (2/3) ... [2018-06-22 14:27:45,302 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11733624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:27:45, skipping insertion in model container [2018-06-22 14:27:45,302 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:27:45" (3/3) ... [2018-06-22 14:27:45,304 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:27:45,314 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:27:45,325 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:27:45,364 INFO ]: Using default assertion order modulation [2018-06-22 14:27:45,364 INFO ]: Interprodecural is true [2018-06-22 14:27:45,364 INFO ]: Hoare is false [2018-06-22 14:27:45,364 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:27:45,364 INFO ]: Backedges is TWOTRACK [2018-06-22 14:27:45,364 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:27:45,364 INFO ]: Difference is false [2018-06-22 14:27:45,364 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:27:45,364 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:27:45,380 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:27:45,390 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:27:45,390 INFO ]: Found error trace [2018-06-22 14:27:45,390 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:27:45,391 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:27:45,396 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:27:45,397 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:27:45,398 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:27:45,438 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:27:45,438 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:27:45,438 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:27:45,490 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:27:45,670 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:27:45,672 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:27:45,672 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:27:45,674 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:27:45,691 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:27:45,692 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:27:45,694 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:27:45,908 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:27:45,908 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:27:45,910 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:27:45,911 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:27:45,911 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:27:45,926 INFO ]: With dead ends: 13 [2018-06-22 14:27:45,926 INFO ]: Without dead ends: 13 [2018-06-22 14:27:45,927 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:27:45,945 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:27:45,965 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:27:45,965 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:27:45,966 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:27:45,967 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:27:45,967 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:27:45,967 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:27:45,967 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:27:45,967 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:27:45,968 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:27:45,968 INFO ]: Found error trace [2018-06-22 14:27:45,968 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:27:45,968 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:27:45,968 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:27:45,968 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:27:45,968 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:27:45,969 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:27:45,969 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:27:45,969 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:27:46,261 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:27:46,785 WARN ]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:27:47,098 WARN ]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 14:27:47,316 WARN ]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:27:47,540 WARN ]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:27:47,543 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:27:47,543 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:27:47,543 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 14:27:47,561 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:27:47,759 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:27:47,780 INFO ]: Computing forward predicates... [2018-06-22 14:27:47,984 WARN ]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-22 14:27:55,865 WARN ]: Spent 5.17 s on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2018-06-22 14:27:56,278 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:27:56,304 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:27:56,304 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:27:56,305 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:27:56,305 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:27:56,305 INFO ]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:27:56,305 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:27:56,657 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 17 [2018-06-22 14:27:56,703 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:27:56,703 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:27:56,704 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:27:56,704 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:27:56,704 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:27:56,705 INFO ]: With dead ends: 15 [2018-06-22 14:27:56,705 INFO ]: Without dead ends: 15 [2018-06-22 14:27:56,705 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:27:56,706 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:27:56,710 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:27:56,710 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:27:56,710 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:27:56,710 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:27:56,710 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:27:56,710 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:27:56,710 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:27:56,710 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:27:56,711 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:27:56,711 INFO ]: Found error trace [2018-06-22 14:27:56,711 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:27:56,711 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:27:56,711 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:27:56,711 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:27:56,711 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:27:56,712 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:27:56,712 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:27:56,712 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:27:57,089 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:27:57,845 WARN ]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:27:58,152 WARN ]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-22 14:27:58,499 WARN ]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-22 14:27:58,731 WARN ]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:27:58,999 WARN ]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:27:59,269 WARN ]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:27:59,270 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:27:59,270 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:27:59,270 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 14:27:59,291 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:27:59,584 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:27:59,584 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:27:59,605 INFO ]: Computing forward predicates... [2018-06-22 14:27:59,842 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-22 14:28:04,282 WARN ]: Spent 2.46 s on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2018-06-22 14:28:07,553 WARN ]: Spent 1.67 s on a formula simplification. DAG size of input: 73 DAG size of output: 32 [2018-06-22 14:28:07,770 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-22 14:28:07,804 INFO ]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:28:07,837 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:28:07,837 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 14:28:07,838 INFO ]: Interpolant automaton has 12 states [2018-06-22 14:28:07,838 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 14:28:07,838 INFO ]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:28:07,838 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 14:28:08,126 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 19 [2018-06-22 14:28:08,420 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:28:08,420 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:28:08,420 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:28:08,420 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 14:28:08,421 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:28:08,421 INFO ]: With dead ends: 17 [2018-06-22 14:28:08,421 INFO ]: Without dead ends: 17 [2018-06-22 14:28:08,423 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2018-06-22 14:28:08,423 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:28:08,425 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:28:08,425 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:28:08,425 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:28:08,425 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:28:08,425 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:28:08,425 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:28:08,425 INFO ]: Interpolant automaton has 12 states. [2018-06-22 14:28:08,425 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:28:08,426 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:28:08,426 INFO ]: Found error trace [2018-06-22 14:28:08,426 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:28:08,426 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:28:08,426 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:28:08,426 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:28:08,426 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:28:08,426 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:28:08,426 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:28:08,426 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:28:08,796 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:28:09,965 WARN ]: Spent 386.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2018-06-22 14:28:10,106 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2018-06-22 14:28:10,222 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:28:10,222 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:28:10,222 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:28:10,236 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:28:10,585 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:28:10,585 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:28:10,612 INFO ]: Computing forward predicates... [2018-06-22 14:28:12,676 WARN ]: Spent 329.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 27 Received shutdown request... [2018-06-22 14:28:38,573 INFO ]: Timeout while computing interpolants [2018-06-22 14:28:38,774 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:28:38,774 WARN ]: Verification canceled [2018-06-22 14:28:38,780 WARN ]: Timeout [2018-06-22 14:28:38,780 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:28:38 BoogieIcfgContainer [2018-06-22 14:28:38,780 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:28:38,781 INFO ]: Toolchain (without parser) took 54865.53 ms. Allocated memory was 336.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 266.0 MB in the beginning and 765.5 MB in the end (delta: -499.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 14:28:38,781 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:28:38,781 INFO ]: ChcToBoogie took 75.32 ms. Allocated memory is still 336.6 MB. Free memory was 264.3 MB in the beginning and 261.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 3.6 GB. [2018-06-22 14:28:38,781 INFO ]: Boogie Preprocessor took 129.93 ms. Allocated memory is still 336.6 MB. Free memory was 261.0 MB in the beginning and 257.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 3.6 GB. [2018-06-22 14:28:38,782 INFO ]: RCFGBuilder took 1168.76 ms. Allocated memory was 336.6 MB in the beginning and 389.0 MB in the end (delta: 52.4 MB). Free memory was 257.8 MB in the beginning and 302.0 MB in the end (delta: -44.2 MB). Peak memory consumption was 83.2 MB. Max. memory is 3.6 GB. [2018-06-22 14:28:38,782 INFO ]: TraceAbstraction took 53482.54 ms. Allocated memory was 389.0 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 302.0 MB in the beginning and 765.5 MB in the end (delta: -463.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 14:28:38,784 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 75.32 ms. Allocated memory is still 336.6 MB. Free memory was 264.3 MB in the beginning and 261.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 129.93 ms. Allocated memory is still 336.6 MB. Free memory was 261.0 MB in the beginning and 257.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 3.6 GB. * RCFGBuilder took 1168.76 ms. Allocated memory was 336.6 MB in the beginning and 389.0 MB in the end (delta: 52.4 MB). Free memory was 257.8 MB in the beginning and 302.0 MB in the end (delta: -44.2 MB). Peak memory consumption was 83.2 MB. Max. memory is 3.6 GB. * TraceAbstraction took 53482.54 ms. Allocated memory was 389.0 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 302.0 MB in the beginning and 765.5 MB in the end (delta: -463.6 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 54 quantified variables from 7 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 53.4s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 33 SDtfs, 16 SDslu, 84 SDs, 0 SdLazy, 59 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 13.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 20.3s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 9548 SizeOfPredicates, 769 NumberOfNonLiveVariables, 1104 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 9/26 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_array_inversion-9.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-28-38-796.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_array_inversion-9.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-28-38-796.csv Completed graceful shutdown